有一个大数据库,有1,000,000,000行,称为线程(这些线程确实存在,我并不是因为我喜欢它而使事情变得更难)。Threads里面只有一些东西,让事情变得更快:(intid,stringhash,intreplycount,intdateline(timestamp),intforumid,stringtitle)查询:select*fromthreadwhereforumid=100andreplycount>1orderbydatelinedesclimit10000,100因为有1G的记录,所以查询速度很慢。所以我想,让我们将这1G的记录拆分到我拥有的论坛(类别)中尽可能多的
我的问题类似于dockerswarminitcouldnotchooseanIPaddresserror,但我发现接受的答案有些含糊,所以我会再问一次。尝试后dockerswarminit我收到一条错误消息Errorresponsefromdaemon:couldnotchooseanIPaddresstoadvertisesincethissystemhasmultipleaddressesondifferentinterfaces(192.168.130.117onenp1s0and192.168.130.89onwlp2s0)-specifyonewith--advertise-
我正在使用Rails并尝试在我的博客应用程序中实现一个功能。我想要为我的博客选择设计的选项。我当然会进行设计并对其进行编码,但在对它们进行编码后,我希望可以选择使用我的设计之一。我会/应该如何处理这个问题? 最佳答案 制作用于选择设计表单列表的Controller(当然要检查选择的有效性)。在session中保存选择并试试这个:在布局中:=stylesheet_link_tag@custom_css在application.rb中classApplicationController我认为这应该可行。另一个想法是改变不同的布局。cla
我安装了多个版本的ruby,当我在emacs上运行“run-ruby”时,它会启动与ruby1.8.7关联的irb,而我想使用ruby1.9.3的irb。有人知道如何配置吗?谢谢! 最佳答案 另请查看rvm.el.如果你要切换,即使只是一次,安装RubyVersionManager(rvm)和切换很容易,在emacs中也同样容易。一石二鸟。 关于emacs中的Ruby模式:howcanIchoosewhichversionofrubyisranwhenrunningirb?,
这个问题在这里已经有了答案:Unexpectedoperatorerror[duplicate](4个回答)关闭6年前。我的代码:#!/bin/sh#filename:choose.shreadchoose["$choose"=="y"-o"$choose"=="Y"]&&echo"Yes"&&exit0["$choose"=="n"-o"$choose"=="N"]&&echo"No"&&exit0echo"WrongInput"&&exit0但是当我执行时sh./choose.sh终端提示我[:4:n::Unexpectedoperator[:5:n::Unexpectedoper
这个问题在这里已经有了答案:Unexpectedoperatorerror[duplicate](4个回答)关闭6年前。我的代码:#!/bin/sh#filename:choose.shreadchoose["$choose"=="y"-o"$choose"=="Y"]&&echo"Yes"&&exit0["$choose"=="n"-o"$choose"=="N"]&&echo"No"&&exit0echo"WrongInput"&&exit0但是当我执行时sh./choose.sh终端提示我[:4:n::Unexpectedoperator[:5:n::Unexpectedoper
LiJiansheng,alsoknownbyhispennameKuoSi,isanopen-sourceevangelist,creatoroftheOpenSourceWaycommunity,andauthorof"TheMythsofOpenSource",atrilogyaboutopen-sourceachievements.AchanceencounterwithaRedHatLinux7.3CDchangedLiJiansheng'slifeandledhimheadlongintotheopen-sourcecommunity.Overnearlytwodecades,he
LiJiansheng,alsoknownbyhispennameKuoSi,isanopen-sourceevangelist,creatoroftheOpenSourceWaycommunity,andauthorof"TheMythsofOpenSource",atrilogyaboutopen-sourceachievements.AchanceencounterwithaRedHatLinux7.3CDchangedLiJiansheng'slifeandledhimheadlongintotheopen-sourcecommunity.Overnearlytwodecades,he
Therearenowinnersintherevengestory.WemayallhaveheardsomestrikingstoriesthatafuriousITemployeedeletedthedataofthecompanyandthen runawayforeverasrevengeon theworkplacewherehemightreceivemistreatmentinhismind.Whetheraprogrammertakesthismethodtoexpresshisgrudgeorholdsitasahostagetodemandunpaidsalarieswh
Therearenowinnersintherevengestory.WemayallhaveheardsomestrikingstoriesthatafuriousITemployeedeletedthedataofthecompanyandthen runawayforeverasrevengeon theworkplacewherehemightreceivemistreatmentinhismind.Whetheraprogrammertakesthismethodtoexpresshisgrudgeorholdsitasahostagetodemandunpaidsalarieswh